diff -u old//modules.py new//modules.py
--- old//modules.py	2011-10-25 16:59:21.563000004 +0200
+++ new//modules.py	2011-10-25 17:00:34.575000004 +0200
@@ -38,6 +38,7 @@
 import univention.admin.syntax
 import univention.admin.hook
 import univention.admin.localization
+from univention.admin.layout import Tab
 
 translation=univention.admin.localization.translation('univention/admin')
 _=translation.translate
@@ -173,7 +174,7 @@
 		#if module.initialized: # reload custom attributes
 		removetab = []
 		for tab in module.layout:
-			if tab.short_description in custom_fields.keys():
+			if tab.label in custom_fields.keys():
 				removetab.append(tab)
 		for tab in removetab:
 			module.layout.remove(tab)
@@ -283,7 +284,7 @@
 		for item in itemlist:
 			if is_property_in_layout(item, field):
 				return True
-	elif itemlist.property == field.property:
+	elif itemlist == field:
 		return True
 	return False
 
@@ -477,8 +478,8 @@
 		# remove fields on tabs marked for replacement
 		removetab = []
 		for tab in module.layout:
-			if tab.short_description in overwriteTabList:
-				tab.set_fields( [] )
+			if tab.label in overwriteTabList:
+				tab["layout"] = []
 
 		for tabname in properties4tabs.keys():
 			priofields = properties4tabs[tabname]
@@ -488,12 +489,12 @@
 			currentTab = None
 			# get existing fields if tab has not been overwritten
 			for tab in module.layout:
-				ud.debug(ud.ADMIN, ud.INFO, 'modules update_extended_attributes: tabname=%s   tab.short=%s' % (tabname, tab.short_description) )
+				ud.debug(ud.ADMIN, ud.INFO, 'modules update_extended_attributes: tabname=%s   tab.short=%s' % (tabname, tab.label) )
 
-				if tab.short_description == tabname:
+				if tab.label == tabname:
 					currentTab = tab
 					# found tab in layout
-					fields = currentTab.get_fields()
+					fields = currentTab["layout"]
 					# get last line
 					if len(fields) > 0:
 						if len(fields[-1]) == 1:
@@ -521,11 +522,11 @@
 			ud.debug(ud.ADMIN, ud.INFO, 'modules update_extended_attributes: lastprio=%s   lastfield=%s'% (lastprio,lastfield))
 			for (prio, field, tabAdvanced, overwritePosition, fullWidth) in priofields:
 				ud.debug(ud.ADMIN, ud.INFO, 'modules update_extended_attributes: custom fields found prio %s'% prio)
-				if currentTab.advanced and not tabAdvanced:
-					currentTab.advanced = False
+				if currentTab["advanced"] and not tabAdvanced:
+					currentTab["advanced"] = False
 
 				# do not readd property if already present in layout
-				if lastfield and lastfield.property == field.property:
+				if lastfield == field:
 					continue
 				if is_property_in_layout(fields, field):
 					continue
@@ -541,11 +542,11 @@
 						oldfield = fields[ fline ][ fpos ]
 						fields[ fline ][ fpos ] = field
 						ud.debug(ud.ADMIN, ud.INFO,
-											   'modules update_extended_attributes: replacing field "%s" with "%s" on position "%s" (%s,%s)' % (oldfield.property, field.property, prio, fline, fpos))
+											   'modules update_extended_attributes: replacing field "%s" with "%s" on position "%s" (%s,%s)' % (oldfield, field, prio, fline, fpos))
 					else:
 						fields[ fline ].append( field )
 						ud.debug(ud.ADMIN, ud.INFO,
-											   'modules update_extended_attributes: added new field "%s" on position "%s" (%s,%s)' % (field.property, prio, fline, fpos))
+											   'modules update_extended_attributes: added new field "%s" on position "%s" (%s,%s)' % (field, prio, fline, fpos))
 				else:
 					if fullWidth:
 						fields.append([field])
@@ -574,7 +575,7 @@
 			if lastfield:
 				fields.append([lastfield])
 				ud.debug(ud.ADMIN, ud.INFO, 'modules update_extended_attributes: one custom field added %s'% fields)
-			currentTab.set_fields(fields)
+			currentTab["layout"] = fields
 			ud.debug(ud.ADMIN, ud.INFO, 'modules update_extended_attributes: layout for tab %s finished: %s'% (tabname, fields) )
 
 	# check for properties with the syntax class LDAP_Search
diff -u old//syntax.py new//syntax.py
--- old//syntax.py	2011-10-25 16:59:13.597000004 +0200
+++ new//syntax.py	2011-10-25 16:59:01.351000003 +0200
@@ -2510,6 +2510,7 @@
 		self.name = self.__class__.__name__
 		self.viewonly = viewonly
 		self.addEmptyValue = addEmptyValue
+		self.base = ''
 
 	@classmethod
 	def parse( self, text ):